title: High-power terahertz electromagnetic wave emission from high-T(c) superconducting Bi2Sr2CaCu2O(8+δ) mesa structures.
abstract: In this paper, we report intense electromagnetic wave emissions generated by the rectangular mesa structure of intrinsic Josephson junctions with high-T(c) superconducting Bi2Sr2CaCu2O(8+δ). The radiated power is an order of magnitude stronger than that of the previously observed power of a few μW. Two emission regions, reversible (R-type) and irreversible (IR-type), with comparable intensities can be observed at different I-V curve locations in the same mesa. We find peculiar temperature dependences of the emission power in both the R- and IR-type radiations, suggesting that a non-equilibrium thermodynamic state may be realized through the dc input current. The R-type emission is quite stable, whereas the IR-type emission is rather unstable. Although the emitted frequency for both cases obey the cavity resonance conditions, this sharp contrast in emission stability is indicative of two different states in a multi-stacked intrinsic Josephson junction system.
authors.affiliation: Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan. tetragonal23@gmail.com
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Yamaki
authors.forename: Manabu
authors.initials: M
authors.lastname: Tsujimoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Akio
authors.initials: A
authors.lastname: Furukawa
authors.forename: Takanari
authors.initials: T
authors.lastname: Kashiwagi
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Minami
authors.forename: Kazuo
authors.initials: K
authors.lastname: Kadowaki